The temperature was 55 at the Inner Harbor Sunday morning, well down from the average of 72 for the date. Suffern said the chilliness was the result of Arctic air pushing down into the region from Canada.

Tonight's low is forecast at 43 degrees. Monday is expected to be chilly as well, with a high of 58 and a slight chance of rain. But temperatures should rise back into the mid-70s by Wednesday, according to the weather service.